I have one. I bought it at a consignment auction for $75, new old stock.
I haven't shot it much as my intent was to use it in MN with open sights as they only allow 1x scopes. Then I found out I had reached the "magic" age and could use my X-7 with it's 3x9.
IIRC it did okay with 90 gn/vol of Prodex and 250 gn SST's. Also had heavy blow back and since I put a scope on it cleaning is more complicated.
Haven't shot it in a couple of years.